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Two-Potato Gratin

Photo: Kate Sears
Prep time 15 mins
Cook time 1 hr, 15 mins
Total time 1 hr, 30 mins
Yield Serves 8

Ingredients

  • 1 tablespoon chopped fresh sage
  • 1 tablespoon chopped fresh thyme
  • 2 pounds russet potatoes, peeled, sliced 1/8-inch thick
  • 2 pounds sweet potatoes, peeled, sliced 1/8-inch thick
  • 1 1/2 teaspoons salt
  • 1/2 teaspoon pepper
  • 1 1/2 cups half-and-half
  • 1/2 cup low-sodium chicken broth
  • 1 1/2 cups grated Gruyère

Nutrition Information

  • calories 334
  • fat 12 g
  • satfat 7 g
  • protein 12 g
  • carbohydrate 46 g
  • fiber 5 g
  • cholesterol 39 mg
  • sodium 595 mg

How to Make It

  1. Preheat oven to 425ºF. Line a large, rimmed baking sheet with foil. Mist a 3-quart shallow microwave- and oven-safe baking dish with cooking spray. Combine sage and thyme in a small bowl. In baking dish, layer 1/3 of potatoes and sweet potatoes, alternating the slices. Sprinkle with 1/3 of herb mixture and 1/3 each salt and pepper. Repeat layering 3 times.

  2. Combine half-and-half and broth and pour over potatoes. Place dish on baking sheet and cover with foil. Bake 50 minutes. Uncover, sprinkle with cheese and bake until golden and bubbly, 20 to 25 minutes longer. Let rest for 10 minutes before serving.